android onTouchEvent 左右手勢滑動事件處理

要實現手指在螢幕上左右滑動的事件需要執行個體化對象GestureDetector，new GestureDetector(MainActivity.this,onGestureListener);首先實現監聽對象GestureDetector.OnGestureListener，根據x或y軸前後變化座標來判斷是左滑動還是右滑動並根據不同手勢滑動做出事件處理doResult（int action），

然後覆寫onTouchEvent方法，在onTouchEvent方法中將event對象傳給gestureDetector.onTouchEvent(event);處理。

 

MainActivity.java

import android.view.GestureDetector;public MainActivity extends TabActivity implements OnClickListener {final int RIGHT = 0;final int LEFT = 1;private GestureDetector gestureDetector;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {requestWindowFeature(Window.FEATURE_NO_TITLE);super.onCreate(savedInstanceState);setContentView(R.layout.main);gestureDetector = new GestureDetector(MainActivity.this,onGestureListener);}private GestureDetector.OnGestureListener onGestureListener = new GestureDetector.SimpleOnGestureListener() {@Overridepublic boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) {float x = e2.getX() - e1.getX();float y = e2.getY() - e1.getY();if (x > 0) {doResult(RIGHT);} else if (x < 0) {doResult(LEFT);}return true;}};public boolean onTouchEvent(MotionEvent event) {return gestureDetector.onTouchEvent(event);}public void doResult(int action) {switch (action) {case RIGHT:System.out.println("go right");break;case LEFT:System.out.println("go right");break;}}}

 參考http://www.cnblogs.com/meieiem/archive/2011/09/16/2178313.html